* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --fg: #000000;
  --bg: #ffffff;
  --accent: #9a7f5f;
  --accent-soft: rgba(154, 127, 95, 0.12);
  --muted: #666666;
  --border: rgba(154, 127, 95, 0.35);
}

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
}

.sous-titre {
  color: var(--muted);
  margin-top: 0.5rem;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

form {
  display: grid;
  gap: 1.25rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  background: var(--accent-soft);
  padding: 1.75rem;
  border-radius: 12px;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

fieldset legend {
  padding: 0 0.5rem;
  font-weight: 600;
}

fieldset label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-right: 1rem;
  margin-top: 0.25rem;
}

.champ {
  display: grid;
  gap: 0.4rem;
}

.champ > span:first-child {
  font-weight: 600;
}

.aide {
  color: var(--muted);
  font-size: 0.85rem;
}

input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

input:focus,
select:focus,
textarea:focus,
button:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 0.85rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

button[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.rgpd {
  color: var(--muted);
  font-size: 0.8rem;
  text-align: center;
}

#loader {
  text-align: center;
  padding: 1.5rem;
  color: var(--accent);
  font-weight: 600;
}

#erreur {
  text-align: center;
  padding: 1rem;
  border: 1px solid #c44;
  background: #fee;
  color: #800;
  border-radius: 8px;
  margin-bottom: 1rem;
}

#resultats {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.intro {
  grid-column: 1 / -1;
  text-align: center;
  font-style: italic;
  color: var(--muted);
  padding: 0.5rem 0 1rem;
}

.carte {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  background: var(--bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.carte .titre {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.carte .prix {
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
}

.carte .argumentaire {
  color: var(--fg);
  font-size: 0.95rem;
}

.carte .lien {
  align-self: flex-start;
  margin-top: auto;
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
  border: 1px solid var(--accent);
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
}

.carte .lien:hover {
  background: var(--accent);
  color: #fff;
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

@media (min-width: 720px) {
  #resultats { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  #resultats { grid-template-columns: repeat(3, 1fr); }
}